Which of the following is correct for r-selected species ?

Options

A. Small number of progeny with small size
B. Small number of progeny with large size
C. Large number of progeny with small size
D. Large number of progeny with large size

Answer

To determine which statement is correct for r-selected species, we need to understand the characteristics of r-selected species in ecology. Here’s a step-by-step solution:

1. **Definition of r-selected species**: R-selected species are organisms that prioritize reproduction. The "r" stands for the intrinsic growth rate of the population. These species tend to produce many offspring in a short period.

2. **Reproductive strategy**: R-selected species invest minimal resources in each offspring. This means they produce a large number of offspring but do not provide extensive parental care or investment in each individual.

3. **Characteristics of offspring**: The offspring of r-selected species are usually small in size. This allows the species to produce a greater number of them, as smaller offspring require less energy and resources to produce.

4. **Evaluating the options**:
- **Option 1**: Small number of progeny with small size - This is incorrect because r-selected species produce a large number of progeny.
- **Option 2**: Small number of progeny with large size - This is also incorrect for the same reason; r-selected species do not produce few large offspring.
- **Option 3**: Large number of progeny with small size - This is correct, as it aligns with the characteristics of r-selected species.
- **Option 4**: Large number of progeny with large size - This is incorrect because r-selected species do not produce large offspring.

5. **Conclusion**: The correct answer is **Option 3: Large number of progeny with small size**.